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Time zonesLive · DST-aware

JST to BST Converter

See the current time in JST (Tokyo) and BST (London) side by side, the exact time difference right now, and convert any time between the two zones.

Quick presets

JST to BST Converter

JST
Tokyo
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BST
London
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Uses your browser's built-in, DST-aware time-zone data.

ToolFeather · Intl API

About converting JST to BST

Japan Standard Time (Tokyo) and British Time (London) (London) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.

To plan across the two, type a time into the JST box (or tap a quick preset) and read the BST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.

JST vs BST: the time difference through the year

The gap between JST and BST changes during the year because only one of them uses daylight saving.

PeriodDifference
Oct 23, 2026 – Oct 24, 2026BST 8 h behind JST
Oct 25, 2026 – Mar 27, 2027BST 9 h behind JST
Mar 28, 2027 – Oct 23, 2027BST 8 h behind JST

Daylight-saving changes in the next year

ZoneDateOffsetChange
BSTOct 25, 2026UTC+1 → UTC+0Clocks go back 1 hour
BSTMar 28, 2027UTC+0 → UTC+1Clocks go forward 1 hour
BSTOct 31, 2027UTC+1 → UTC+0Clocks go back 1 hour

JST to BST conversion table

JSTBST (when 8 h behind)BST (when 9 h behind)
12:00 AM4:00 PM (previous day)3:00 PM (previous day)
1:00 AM5:00 PM (previous day)4:00 PM (previous day)
2:00 AM6:00 PM (previous day)5:00 PM (previous day)
3:00 AM7:00 PM (previous day)6:00 PM (previous day)
4:00 AM8:00 PM (previous day)7:00 PM (previous day)
5:00 AM9:00 PM (previous day)8:00 PM (previous day)
6:00 AM10:00 PM (previous day)9:00 PM (previous day)
7:00 AM11:00 PM (previous day)10:00 PM (previous day)
8:00 AM12:00 AM11:00 PM (previous day)
9:00 AM1:00 AM12:00 AM
10:00 AM2:00 AM1:00 AM
11:00 AM3:00 AM2:00 AM
12:00 PM4:00 AM3:00 AM
1:00 PM5:00 AM4:00 AM
2:00 PM6:00 AM5:00 AM
3:00 PM7:00 AM6:00 AM
4:00 PM8:00 AM7:00 AM
5:00 PM9:00 AM8:00 AM
6:00 PM10:00 AM9:00 AM
7:00 PM11:00 AM10:00 AM
8:00 PM12:00 PM11:00 AM
9:00 PM1:00 PM12:00 PM
10:00 PM2:00 PM1:00 PM
11:00 PM3:00 PM2:00 PM

Best time to meet

The two zones

JST · Japan Standard Time

Japan Standard Time is UTC+9 all year. Japan has not used daylight saving since 1951.

BST · British Time (London)

UK time is GMT (UTC+0) in winter and British Summer Time (BST, UTC+1) from the last Sunday in March to the last Sunday in October. Ireland and Portugal follow the same switch dates.

Frequently asked questions

6 answers
What is the time difference between JST and BST?
It's shown live at the top of this page (and it can change with daylight saving). The converter uses the current, DST-aware difference between Japan Standard Time and British Time (London), so the time you see is always right for right now.
How do I convert JST to BST?
Enter a time in the JST box and the equivalent BST time appears instantly, adjusted for the current offset between the two zones — including a note if it lands on the previous or next day.
Is this JST to BST converter accurate with daylight saving?
Yes. It uses your browser's built-in time-zone database (the IANA zones behind Tokyo and London), which tracks daylight-saving changes automatically, so the current times and difference are correct.
What time is it in London right now?
The live clock above shows the current time in London (BST), updating every second, alongside JST.
Does the JST to BST time difference change?
Yes. Over the next 12 months it is 8 h behind or 9 h behind, depending on the date — see the table of periods on this page.
What is a good meeting time for JST and BST?
Standard 9-to-5 office hours don't overlap; early morning in one zone and evening in the other is the usual compromise — see the table on this page.